Granted Patent
Utility
US 5,319,491 · App. 07/565,481
Optical display
Inventor:
Martin G. Selbrede
Patented Case
View Patent ↗
Granted: Jun 7, 1994
Filed: Aug 10, 1990
Inventor
Martin G. Selbrede
Assignee (at issue)
Continental Typographics, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.